Safety device for corner-staying machines.



E. H. TAYLOR. SAFETY DEVICE FOR CORNER STAYING MAGHINES.

APPLICATION FILED MAR-23,1914.

Patented Sept. 22, 1914.

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UNITED STATES PATENT OFFICE. EUGENE n. rarnon or HYDE max, nassacnusnrrs. sun-r! nnvron roa connnnsrame macmnrs Specification of Letters Patent. Application filed larch as, 191; Serial Io. 828,523.

Patented Sept. 22, 1914..

To all whom it may concern:

Be it known that I, Eocene H..Taripa, a citizen of the United. States, residing at Hyde Park, county of Norfolk, State of Massachusetts, have invented a certain new and useful Improvement in Safety Devices for Corner-Staying Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention has for its object to provide a safety device by means of which the upper die of a corner staying machine shall be prevented from coming down onto the lower die or interposed box if the fingers of the operator are between the dies. Heretofore injury to the hands and fingers-of operators has frequently resulted from the use of-corner staying machines of the ordinary well known type. The mechanism embodying my invention is simple and elficient and does not interfere with the normal operation of the machine.

The invention will be fullyunderstood by reference to the following specification, 2 taken in connection with the accompanying drawings, and the novel features thereof are pointed outand clearly defined in the claims at the close of this specificatioi In the drawings, Figure 1 is a side elevation of a corner staying machine to which is a plied thesafety device embodying my invention; 'Fi .2 is a front view of the upper portion of machine and parts-shown in Fig. 1. Fig. 3 is a front view-showing the parts in the position occupied by them after the safety device has operated.

Referring to the drawings at A is shown the form of lower die member and at B the upper die member. At C is shown the main shaft and at D a crank pin by means of which the upper die member is reciprocatcd vertically. The stay strip is shown .at Fm These parts are well known and commonly." employed in corner staying machines.

The main shaft C supports a cam 40, which actuates a cam follower 41 forming part of a lever 42 pivoted at 43 to the frame of the machine. At 44 is shown another lever parallel to the said lever 42- and pivoted also to the frame of the machine as; shown at 45. The levers are connected and l swung to and fro by; the cam 40 once for each revolution of t e machine. The cam ter 13 on swinging pins 14, 14. end of the hunter 13 contacts at the forward end of the stroke with a movable sto follower 41 is held a ainst the cam by a spring 46 attached to t e lever 42. Secured to the lower ends of said levers 42 and 44 by means. of pins 11,11, is a bar 12, the front end 80 of which'is bent at right angles to the main portion of the bar so that it extends sidewise into.:the space between the upper and lower die'members. The front end 80 is preferably bent to the form shown in Fig. 2 to conform to the space between the two dies formed by the rentrant angle of the upper die. It forms what for convenience may be called the hand-contact member and it will beseen that it reciprocates back and forth into and outof the space between said upper and lower die members, being for "ward in the position shown in Fig. 1 at the time when the dies come together and being back between the upperand lower die'menr hers when the die members are'sep'arated.

a bunhe front The two levers 42 and 44 also'carr 15 pivoted at 16150 the frame of the mac inc and held normally in vertical position by means of the sprin 23. Said stop is carried by the frame 0% fore does not move vertically.

The connecting rod by means of whichtheupper 'die'member B is actuated from .the crank pin D is formed in two parts 17 and 18 hinged together at 19. A spring 26 secured to two lugs and 22 on-the parts '17- and 18' tends'to hold the two members 17 and 18 in the position shown in Fig. 2, to form normally a straight'connecting rod. It will be seen that the arts 17 and 18 of the connecting rod are 'r'e atively wide and that the center of the pintle 19 of the'hinge is- !onsiderably toone side of the median line ofthe connecting rod, the ends of the two m mbers eing in contact with each other, sothat heavy pressurev may be exerted upon .thestay strip without putting undue strain on the hinge members or pintle. The connecting rod member 17 is pivoted at 24 t0 the cross head 25 on which the die member B is secured. A lever 26 projects from one side of the connecting rod member 17 and its end 81 is located directly above the upper end of the movable stop 15, when said mova le stop is in vertical .position. The conuectin rod member 17 and the lever 26 secured tiereto together form a bell crank lever.

lin the normal operation of the machine, thebunter 13 knocks the movable stop 15 the'machine and thereout of the path of the arm 26 which is integral with the lever member of the connect ing rod so that the connecting rod ,is free to move the die B down into contact with the stay strip located over the box on the lower die member. If the fingers of the o erator are between the upper and lower ie members, the hand-contact piece 12 cannot be pushed forward by the levers 42 and 44 and the bunter 13 will not move the movable stop 15 outof the ath of the arm 26. The movable stop 15 wi 1 thus remain in vertical position and the arm 26 will contact with the upper end of the movable stop 15. This will prevent in part the farther downward movement of the cross head 25 and 'upper die member B, bending the two parts of the connecting rod about the inge 19 and extending the sprin 20. It will therefore be seen that the two ie members cannot come togetherif the hand-contact lever is prevented from moving 'forward out of the space between the upper and lower die members. The continued rotation vof the eccentric permits the spring 20 to straighten the connecting rod again so that the machine will operate normally on the next stroke if the hand-contact lever is not displaced.

From the foregoing it will be seen that the presence of the operators hand between the dies will revent the dies coming together, and there ore the'machine may be run with complete safety even by a careless operator. It will also be seen that the handcontact member tends to push the hand of the operator out of the space between the die members, and if the spring 46 is made stiff enough will always do so; I prefer however not to rely on this action because if the machine is run at hi h speed the hand contact member will its f injure the operator.

What I claim is:

l. The'combinationwith a corner staying machine having upper and lower die mem bers, a connectm rod operating one of said die members 0 a hand-contact member moving mto and out of the space between the die members and means acting on said 50 connecting rod and operated by the said hand-contact member to prevent the dies coming together when the said member is between the dies.

2. The combination with a corner staying machine having upper and lower ,die mem-, bers of a connecting rod operating one of said die members, said connecting rod being formed in two parts hinged together, a hand-contact member moving into and out of the space between the die members and connections between said hand-contact member and the connecting rod whereby the said members are caused to swing about said hinge if the hand-contact member is prevented from moving out of the space between the said two die members.

3. In a corner stayin machine, the combination with up er an lower die members one of which is ormed to have a rentrant angle, of a hand-contact member formin part of a safety device, a part of said han contact member being at times between said dies and being shaped to correspond to the space formed between the dies.

4. In a corner staying machine, the combination with upper and lower die members, of a connecting rod operating one of said die members, said connecting rod being made in twoparts hinged together, a handcontact member moving into and out of the space between the two members, an arm secured to one of the parts of the connecting rod and operating to bend the members of the connecting rod about the hinge connection, a vertical stop normally in the path of movement of the said arm, and connections between the said stop and the handout of the path of the arm when the handout of the path of the arm when the handcontact member is out of the space between the two dies.

-In .testimonfy whereof I afiix my signature, in presence 0 two witnesses.

, EUGENE H. TAYLOR.

Witnesses:

GEORGE P. Dmn, Amen H. MomnsoN. 

